39
Electric Boilers
FAULT FINDING
ERROR CODE
POTENTIAL CAUSE
SOLUTION
E0
Heating system contains a lack of
water or pressure is not sufficient for
circulation.
Add treated water to the heating
system and bring the pressure to a
suitable level.
Water pressure switch is damaged.
Check the pressure for the system
is above 1 bar, and then carry out a
continuity test across the pressure
sensor.
Loose connection for pressure switch.
Check the wiring and reseat
connection if loose.
E1
Loose connections between heating
outlet temperature sensor & PCB
Check the wiring and reseat
connection if loose.
Faulty temperature sensor for heating
outlet.
Call Strom on 0333 344 24 74
E2
Loose connection between the heating
return temperature sensor & PCB
Check the wiring and reseat
connection if loose.
Faulty temperature sensor for heating
return.
Call Strom on 0333 344 24 74
E3
Heating system flow temperature
overheating.
Check that there is sufficient system
circulation. If the boiler has been set
for temperatures in excess of 75
o
C
please reduce to between 70 & 75.
E4
Heat exchanger overheating.
The boiler will automatically begin
circulating again once the heat
exchanger has cooled.
E5
Flow sensor failure.
Call Strom on 0333 344 24 74
Pump failure.
E6
Loose connection between domestic
hot water outlet temp. sensor & PCB.
Check the wiring and reseat
connection if loose.
Faulty temp. sensor for domestic hot
water outlet.
Call Strom on 0333 344 24 74
E7
Domestic hot water temperature
greater than 73
o
C
Reduce temperature setting on the
boiler, or increase the mains water
flow rate.
E8
Loose connection between domestic
hot water inlet temp. sensor & PCB
Check the wiring and reseat
connection if loose.
Faulty temperature sensor for
domestic hot water inlet
Call Strom on 0333 344 24 74
